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docs: close phase 7 global split plan (#3962)
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Zhengchao An
@@ -4,13 +4,18 @@ This document records the late global-state cleanup plan after the AppContext
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foundation, storage API contracts, ECStore layout, runtime lifecycle, and cluster
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control-plane boundaries are stable.
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As of the Phase 7 closeout, runtime resolver fallbacks have been pushed out of
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the root facade and into explicit owner-local boundaries. Future work should
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therefore treat broad fallback removal as complete and use this document for the
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remaining ECStore-owned bootstrap state and crate-split decisions.
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## Remaining Global Owners
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| Owner | Current role | Migration stance |
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|---|---|---|
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| `rustfs/src/app/context.rs` | AppContext-first resolver facade with legacy fallback adapters. | Keep resolver entry points stable until every caller has an explicit context or owner-local runtime source. |
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| `rustfs/src/app/context/runtime_sources.rs` | Default AppContext fallback adapters for KMS, IAM, object store, endpoints, config, metrics, and notification state. | This is an allowed fallback boundary, not a business logic owner. |
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| `rustfs/src/*/runtime_sources.rs` | Root, admin, app, server, startup, and storage owner-local runtime-source boundaries. | Business modules use these boundaries instead of calling global state directly. |
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| `rustfs/src/app/context.rs` | AppContext-first resolver facade. | Resolver helpers stay context-first and do not construct concrete no-AppContext defaults. |
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| `rustfs/src/app/context/runtime_sources.rs` | Default adapters for KMS, IAM, object store, endpoints, config, metrics, and notification state used by AppContext construction. | This is an allowed adapter boundary, not a business logic owner. |
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| `rustfs/src/*/runtime_sources.rs` | Root, admin, app, server, startup, and storage owner-local runtime-source boundaries. | Business modules use these boundaries instead of calling global state directly; owner facades own any remaining no-AppContext compatibility defaults. |
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| `rustfs/src/*/storage_api.rs` | Root, admin, app, and storage owner-local storage contract/facade boundaries. | Storage helper and ECStore facade access remains visible at local owner boundaries. |
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| `crates/*/storage_api.rs` | External crate-local storage facade boundaries for IAM, scanner, heal, notify, observability, Swift, and S3 Select. | External runtime crates consume ECStore runtime state through `rustfs_ecstore::api::runtime` instead of the direct global facade. |
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| `crates/ecstore/src/runtime/global.rs` | ECStore bootstrap/runtime state owner. | Keep internal until ECStore has explicit owner handles for all remaining bootstrap state. |
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@@ -40,37 +45,106 @@ update this plan and the guard in the same reviewed migration PR.
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## Fallback Removal Plan
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1. Keep AppContext-first plus global fallback while compatibility tests still
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cover both paths.
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2. Move one remaining consumer group at a time to explicit context or
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owner-local runtime-source handles.
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- Current handoff: admin config, OIDC config, audit runtime config, and
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dynamic KMS config storage reads/writes resolve through current
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AppContext-aware boundaries before using the legacy object-store fallback.
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3. Remove one fallback family per PR only after scans prove no production caller
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depends on it.
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4. Keep embedded startup and tests working before deleting any fallback.
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1. Keep AppContext-first lookup as the stable resolver contract.
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2. Keep concrete no-AppContext compatibility defaults only at owner-local
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runtime-source facades that consume them.
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3. Do not let business logic call `AppContext` or ECStore globals directly when
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an owner-local runtime-source boundary exists.
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4. Keep embedded startup and tests working before deleting any remaining owner
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fallback.
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5. Do not remove ECStore bootstrap globals until ownership handles exist for
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local disks, endpoint pools, lock clients, notification state, tier config,
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lifecycle state, and object-store publication.
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## GLOB-007 Closeout Boundary
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`GLOB-007` is complete when these invariants hold:
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- root `rustfs/src/runtime_sources.rs` is an AppContext/root facade entrypoint
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and no longer composes concrete fallback defaults with `unwrap_or`,
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`unwrap_or_else`, direct `init_global`, or direct `new_global` calls;
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- private AppContext resolver helpers are context-first and do not hide fallback
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closure parameters;
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- admin, app, storage, server, startup, and config owner facades decide when to
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apply no-AppContext compatibility defaults;
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- production callers outside runtime-source and storage-api boundary modules do
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not import ECStore global state directly;
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- the architecture guard keeps the direct `rustfs_ecstore::api::global`
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boundary list explicit.
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Allowed remaining fallbacks are owner compatibility decisions, not resolver
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fallback families. They are kept so embedded startup, tests, and no-context
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callers preserve the previous behavior while higher layers continue migrating
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to explicit AppContext ownership.
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## Crate Split Evaluation
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`ecstore-erasure` and `storage-cluster` remain proposal-only until dependency
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cycles and hot-path risks are proven safe.
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cycles and hot-path risks are proven safe. The Phase 7 evaluation is complete
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for now: neither split is ready for code movement in this migration round.
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Required evidence before a split:
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### CRATE-001: `ecstore-erasure`
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- dependency graph showing no cycle with ECStore, storage API, runtime, or
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cluster control-plane owners;
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- benchmark or profiling evidence for erasure and bitrot hot paths;
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- compatibility plan for public ECStore facade paths and test harnesses;
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- rollback plan that preserves quorum, remote disk, lock, and data movement
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behavior.
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Current coupling:
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- erasure decoding depends on disk errors, disk read timeouts, and set-disk
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shard sources;
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- set-disk read/write/heal paths construct erasure codecs in hot object I/O
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paths;
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- bitrot readers/writers live in ECStore IO support and are used by both
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erasure and set-disk code;
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- public compatibility still exposes erasure symbols through
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`rustfs_ecstore::api::erasure`.
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Decision: do not split in code yet. The erasure boundary is a candidate only
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after the shard-source, disk-error, bitrot, and metrics contracts are explicit
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enough to avoid a dependency cycle back into ECStore.
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Required evidence before proposing the split:
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- `cargo tree -p rustfs-ecstore -e normal --depth 2` snapshot for dependency
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impact;
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- focused benchmarks for encode/decode, read reconstruction, bitrot verification,
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and large-object streaming;
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- contract sketch for shard sources, disk errors, bitrot IO, metrics, and file
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metadata without importing ECStore implementation modules;
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- compatibility plan for `rustfs_ecstore::api::erasure` and test harnesses;
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- rollback plan that keeps object read/write quorum and old-version file decode
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behavior unchanged.
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### CRATE-002: `storage-cluster`
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Current coupling:
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- cluster RPC remote disk code depends on disk stores, disk health tracking,
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set-disk buffer sizing, local disk scan guards, internode metrics, and runtime
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credential/signature sources;
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- peer S3 and peer REST clients share bucket metadata, disk quorum reduction,
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endpoint layout, local disk initialization, and store helpers;
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- control-plane snapshots are separated from data-plane RPC, but remote disk and
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peer clients still own data movement side effects inside ECStore.
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Decision: do not split in code yet. The storage-cluster boundary is a candidate
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only after remote disk, peer health, lock/quorum, runtime metrics, and endpoint
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layout contracts are explicit enough to stand below ECStore without circular
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dependencies.
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Required evidence before proposing the split:
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- dependency graph showing no cycle with ECStore, `rustfs-storage-api`, runtime
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source owners, or cluster control-plane owners;
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- RPC contract sketch for remote disk, peer S3, peer REST, auth/signature,
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internode metrics, and cancellation;
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- compatibility plan for `rustfs_ecstore::api::cluster`, `api::rpc`, and test
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fixtures that build local disks or endpoint pools;
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- focused tests for remote disk error classification, peer health recovery,
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per-pool quorum reduction, lock behavior, and data-stream request paths;
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- rollback plan that preserves quorum, remote disk IO, lock, peer health, and
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data movement behavior.
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## Preservation Rules
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- Do not remove AppContext fallback in a broad cleanup PR.
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- Do not reintroduce AppContext resolver fallback families in broad cleanup PRs.
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- Do not introduce direct global reads in admin, app, server, storage, scanner,
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heal, IAM, notify, observability, Swift, or S3 Select business logic.
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- Do not split crates in the same PR that moves runtime state.
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@@ -5,7 +5,7 @@ Status values: `[ ]` not started, `[~]` in progress, `[x]` complete, `[!]` block
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## Current Context
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- Issue: [`rustfs/backlog#660`](https://github.com/rustfs/backlog/issues/660)
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- Branch: `overtrue/arch-runtime-root-fallback-facade-cleanup`
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- Branch: `overtrue/arch-phase7-global-closeout`
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- Baseline: completed `C-011/C-012/C-013/API-055/API-059/API-079/API-080/API-081/API-082/API-083/API-084/API-085/API-086/API-087/API-088/API-089/API-090/API-091/API-092/API-093/API-094/API-095/API-096/API-097/API-098/API-099/API-100/API-101/API-102/API-103/API-104/API-105/API-106/API-107/API-108/API-109/API-110/API-111/API-112/API-113/API-114/API-115/API-116/API-117/API-118/API-119/API-120/API-121/API-122/API-123/API-124/API-125/API-126/API-127/API-128/API-129/API-130/API-131/API-132/API-133/API-134/API-135/API-136/API-137/API-138/API-139/API-140/API-141/API-142/API-143/API-144/API-145/API-146/API-147/API-148/API-149/API-150/API-151/API-152/API-153/API-154/API-155/API-156/API-157/API-158/API-159/API-160/API-161/API-162/API-163/API-164/API-165/API-166/API-167/API-168/API-169/API-170/API-171/API-172/API-173/API-174/API-175/API-176/API-177/API-178/API-179/API-180/API-181/API-182/API-183/API-184/API-185/API-186/API-187/API-188/API-189/API-190/API-191/API-192/API-193/API-194/API-195/API-196/API-197/API-198/API-199/API-200/API-201/API-202/API-203/API-204/API-205/API-206/API-207/API-208/API-209/API-210/API-211/API-212/API-213/API-214/API-215/API-216/API-217/API-218/API-219/API-220/API-221/API-222/API-223/API-224/API-225/API-226/API-227/API-228/API-229/API-230/API-231/API-232/API-233/API-234/API-235/API-236/API-237/API-238/API-239/API-240/API-241/API-242/API-243/API-244/API-245/API-246/API-247/API-248/API-249/API-250/API-251/API-252/API-253/API-254/CTX-002`.
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- Current baseline also includes API-255 from PR #3923, API-256 from PR
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#3925, CFG-009 from PR #3927, C-007/C-009 from PR #3935, C-008/C-010
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@@ -25,19 +25,17 @@ Status values: `[ ]` not started, `[~]` in progress, `[x]` complete, `[!]` block
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PR #3953, the GLOB-007 runtime resolver fallback boundary cleanup from
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PR #3954, the GLOB-007 service/credential resolver fallback removal from
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PR #3955, the GLOB-007 scalar/handle resolver fallback removal from PR #3957,
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and the GLOB-007 specialized resolver fallback boundary from PR #3958.
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- Current phase PR: GLOB-007 root runtime fallback facade cleanup.
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- Based on: `origin/main` after PR #3958 merged.
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- PR type for this branch: `ci-gate`.
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- Runtime behavior changes: no intended behavior change; admin, app, storage,
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server, startup, and config owner facades preserve their existing
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no-AppContext defaults.
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- Rust code changes: remove concrete default fallback wrappers from the root
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`runtime_sources` facade and move those defaults to the owner facades that
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consume them.
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the GLOB-007 specialized resolver fallback boundary from PR #3958, and the
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GLOB-007 root runtime fallback facade cleanup from PR #3961.
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- Current phase PR: Phase 7 global-state and crate-split closeout.
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- Based on: `overtrue/arch-runtime-root-fallback-facade-cleanup` while PR #3961
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is pending; rebase onto `origin/main` after #3961 merges.
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- PR type for this branch: `docs-only`.
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- Runtime behavior changes: none.
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- Rust code changes: none.
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- CI/script changes: none intended.
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- Docs changes: update this progress ledger for the root fallback facade
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cleanup.
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- Docs changes: close out GLOB-007 fallback-removal boundaries and complete the
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CRATE-001/CRATE-002 split-readiness evaluation.
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## Phase 0 Tasks
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@@ -2790,7 +2788,7 @@ Status values: `[ ]` not started, `[~]` in progress, `[x]` complete, `[!]` block
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dependent runtime owners have explicit handles.
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- Verification: focused compile coverage, architecture migration guard, diff
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hygiene, Rust risk scan, and full PR gate.
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- [~] `GLOB-007` Remove fallbacks.
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- [x] `GLOB-007` Remove fallbacks.
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- Completed slice: move admin config, OIDC config, audit runtime config, and
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dynamic KMS config storage access paths to current AppContext-aware
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resolver boundaries, and expose notification-system/server-config
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@@ -2838,16 +2836,28 @@ Status values: `[ ]` not started, `[~]` in progress, `[x]` complete, `[!]` block
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outbound TLS state, scanner metrics, S3 Select DB, server-config publish,
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and storage-class publish no-AppContext fallbacks from AppContext resolvers
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to root runtime facade wrappers.
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- Remaining work: remove the next fallback family per PR only after scans
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prove no production caller depends on it.
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- Current slice: remove concrete no-AppContext default composition from the
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root runtime facade and leave those compatibility decisions at the owner
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facades that consume them.
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- Closeout: root runtime facade owns AppContext/root facade entrypoints only;
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owner runtime facades preserve required no-AppContext defaults, and the
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global-state split plan records that remaining fallbacks are owner
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compatibility decisions rather than resolver fallback families.
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- Remaining work: none for Phase 7 fallback-removal scope. Future fallback
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cleanup must be an owner-specific behavior-preservation PR with focused
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tests.
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- Verification: focused RustFS compile and admin test-target compile,
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resolver residual scan, formatting, diff hygiene, architecture guard, Rust
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risk scan, and full PR gate.
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- [~] `CRATE-001/CRATE-002` Evaluate future crate splits.
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- Current slice: record evidence required before `ecstore-erasure` or
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`storage-cluster` split proposals.
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- Remaining work: dependency graph, benchmark/profiling evidence,
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compatibility plan, and rollback plan before any split code.
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- [x] `CRATE-001/CRATE-002` Evaluate future crate splits.
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- Current slice: complete the split-readiness evaluation for
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`ecstore-erasure` and `storage-cluster`.
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- Closeout: neither crate split is ready for code movement in this migration
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round. The plan records current coupling, required dependency graphs,
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benchmark/profiling evidence, compatibility plans, test coverage, and
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rollback requirements before any future split proposal.
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- Remaining work: none for Phase 7 evaluation scope. Any future split starts
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with a proposal PR and evidence pack, not code movement.
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## Phase 8 Background Controller Tasks
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@@ -6098,14 +6108,17 @@ Status values: `[ ]` not started, `[~]` in progress, `[x]` complete, `[!]` block
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## Next PRs
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1. `consumer-migration`: move to the next phase-level cleanup batch from the
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current handoff, keeping behavior-owned ECStore internals in ECStore until a
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pure-move slice is concrete and verified.
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1. `docs-only`: merge the Phase 7 closeout branch after PR #3961 lands.
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2. `ci-gate`: run a final issue #660 versus local-plan versus progress-ledger
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validation pass before declaring the migration complete.
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## Pre-Push Review Log
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| Expert | Status | Notes |
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|---|---|---|
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| Quality/architecture | pass | Phase 7 closeout marks GLOB-007 complete only after the root runtime facade stops composing concrete fallback defaults and crate split work remains proposal-only. |
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| Migration preservation | pass | No Rust code changes; owner runtime facades retain no-AppContext compatibility defaults, and future erasure/cluster splits are deferred until evidence and rollback plans exist. |
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| Testing/verification | pass | Docs-only branch passed architecture migration guard, shell syntax check, diff hygiene, status scan, crate-split evidence scans, and Rust-source unchanged scan before PR. |
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| Quality/architecture | pass | GLOB-007 removes concrete fallback composition from the root runtime facade; owner facades now decide when to apply fallback factories. |
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| Migration preservation | pass | Existing admin, app, storage, server, startup, and config no-AppContext defaults are preserved at their consuming owner boundaries. |
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| Testing/verification | pass | Focused resolver, TLS, S3 Select, config, and config-info tests passed; compile, formatting, architecture guard, residual scans, diff hygiene, Rust risk scan, and full `make pre-pr` passed before PR. |
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@@ -9879,9 +9892,22 @@ Notes:
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- `make pre-pr`: passed, including 6918 nextest tests passed, 112 skipped,
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and doctests passed.
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- Issue #660 Phase 7 global-state and crate-split closeout:
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- `rg -n "^- \[[~!]\]|^- \[ \]" docs/architecture/migration-progress.md`:
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passed; no in-progress, blocked, or not-started task rows remain in the
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progress ledger.
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- `bash -n scripts/check_architecture_migration_rules.sh`: passed.
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- `./scripts/check_architecture_migration_rules.sh`: passed.
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- `git diff --check`: passed.
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- Rust source unchanged scan: passed; no `*.rs`, `*.toml`, or `*.sh` files
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changed in this docs-only closeout.
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- `cargo tree -p rustfs-ecstore -e normal --depth 2`: reviewed for
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CRATE-001/CRATE-002 split impact.
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- Erasure and storage-cluster coupling scans: reviewed for crate-split
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readiness evidence.
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## Handoff Notes
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- Continue with larger consumer-migration batches outside the cleaned
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app/storage/admin/scanner/heal/Swift/runtime/obs/notify/S3 Select/IAM/test,
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fuzz, and storage owner root boundaries; keep ECStore-owned behavior in
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ECStore until concrete behavior is isolated enough for a pure-move slice.
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- After PR #3961 and the Phase 7 closeout PR land, run the final issue #660
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versus local-plan versus progress-ledger validation pass before declaring the
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migration complete.
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Reference in New Issue
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